Hey, Good morning @EdwinGuillermoSantosMansilla,
Thank you for posting your question. To join a table in an Excel spreadsheet you will be matching a common field (key) using the location type > Geographic data -
Next, you will select the data to join to. Click and select a data repository from the drop-down menu -
You may reference Add ArcGIS layer to Excel as a follow up resource. Please let me know if this did the trick or if you need additional support.
Best,
SC
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